Iron Horse Overcrossing

District 4 Supervisor Karen Mitchoff

Hello and welcome to the District IV website! As your County Supervisor, I was elected to serve the diverse communities of Clayton, Concord, Pleasant Hill, part of Walnut Creek, and the unincorporated Contra Costa Centre.

We live in an ever-evolving economy with constant change in community needs, and serving constituents in District IV is my #1 Priority. I encourage you to contact me directly with any questions or concerns you might have.

County Initiatives to Follow

Supervisor Mitchoff's Response to

Delta Tunnels News

SACRAMENTO, CA - In response to an announcement yesterday by the US Fish and Wildlife Service and National Marine Fisheries Service regarding their biological opinion of environmental impacts of the California "WaterFix" twin tunnels plan through the Sacramento-San Joaquin Delta, the Delta Counties Coalition (DCC) issued the following statement:

"The agencies responsible for protecting the sensitive and critical environmental balance that is the Delta are acting against the clear scientific evidence showing that this project is devastating for the Delta," said San Joaquin County Supervisor Kathy Miller.

"It is incredibly difficult to understand or reconcile how the addition of 1,800 acres of habitat restoration to this massive water operations project now results in a "no-jeopardy" finding for the listed species; it certainly does nothing to reduce the socioeconomic impacts to the people that live and work in the Delta," said Supervisor Karen Mitchoff of Contra Costa County.

"We are still hopeful that the ratepayers in water districts such as Metropolitan, Westlands, and Santa Clara, realize that $17.1 billion should only be spent on projects that will actually produce more water," said Solano County Supervisor Skip Thomson.

The DCC advocates for protecting the interests of the Delta and California's water supply and supports a set of approaches that will achieve balance for the economic and environmental health of the Delta while also improving water supply stability. These solutions include:

Improving the ability to move water around as needed with cost-effective water system operation improvements.

Increasing storage capacity.

Reinforcing our levee system.

Increasing opportunities for local storage, increased conservation plans, water reuse and recycling and desalination.

Restoring the Delta's health so that it can continue its role as an economic, agricultural, recreational and environmental engine for the region and state.

"There are currently multiple projects throughout California that provide these solutions and would cost billions less, and unlike the tunnels, would produce millions of acre-feet of new water to address the state's current and long-term water needs," noted San Joaquin County Supervisor, Chuck Winn. "Also, the additional storage would greatly benefit the environment and reduce the adverse impacts of floods and future droughts."

2020 Census Planning in Contra Costa County

Idle Free Pledge

The Contra Costa County Board of Supervisors is the first local government in the Bay Area to go idle free. On April 25, in conjunction with Earth Day, each member of the Board of Supervisors took the Idle Free Pledge. I'm proud to have led this effort with my colleagues!

Transportation from vehicles is one of the largest sources of air pollution in Contra Costa County, representing 47 percent of total greenhouse gas emissions in 2013. These emissions have negative impacts on our health, including aggregated asthma, coughing or difficult breathing, decreased lung function, cardiovascular problems, and bronchitis. The U.S. Department of Energy estimates that idling in personal vehicles wastes about three billion gallons of fuel annually.